Narrow Linewidth Laser Frequency Stabilization System for Integrating Sphere Cold Atom Clock

Hanghang Qi; Bowen Yang; Haojie Zhao; Ling Xiao; Jianliao Deng; Huadong Cheng

doi:10.3788/LOP222036

Journals >Laser & Optoelectronics Progress >Volume 60 >Issue 15 >Page 1514008 > Article

Laser & Optoelectronics Progress
Vol. 60, Issue 15, 1514008 (2023)

Narrow Linewidth Laser Frequency Stabilization System for Integrating Sphere Cold Atom Clock

Hanghang Qi^1,2, Bowen Yang^1,2, Haojie Zhao^1,2, Ling Xiao¹..., Jianliao Deng^1,** and Huadong Cheng^1,*|Show fewer author(s)

Author Affiliations

¹Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

²University of Chinese Academy of Sciences, Beijing 100049, China

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DOI: 10.3788/LOP222036 Cite this Article Set citation alerts

Hanghang Qi, Bowen Yang, Haojie Zhao, Ling Xiao, Jianliao Deng, Huadong Cheng. Narrow Linewidth Laser Frequency Stabilization System for Integrating Sphere Cold Atom Clock[J]. Laser & Optoelectronics Progress, 2023, 60(15): 1514008 Copy Citation Text

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Abstract

In this study, the frequency of the external cavity diode laser (ECDL) is locked to the hyperfine transition of ⁸⁷Rb D₂ line 5²S_1/2, F=2→5²P_3/2, F=3 using modulation transfer spectroscopy (MTS) frequency stabilization. The laser linewidth is narrowed from 382.18 kHz in the free-running mode to 37.94 kHz after frequency stabilization. The narrow linewidth laser after frequency stabilization can be utilized as the probe light for the integrating sphere cold atom clock. Thus, the contribution of the laser frequency noise to the short-term instability of the atomic clock could be smaller than 5.6×10^-14 τ^-1/2.

Keywords

external cavity diode laser frequency stability integrating sphere cold atom clock laser and laser optics laser frequency stabilization modulation transfer spectroscopy